Irreversible, tight-binding inhibition of adenosine deaminase by coformycins: Inhibitor structural features that contribute to the mode of enzyme inhibition

Article abstract of DOI:10.1080/07328319708006131

Coformycin analogues 1-6 were synthesized and biochemically screened against adenosine deaminase in order to assess the relative contributions of N-4, N-6, and the N-3 sugar moiety to the mode of enzyme inhibition. Our results indicate that N-4 plays a relatively greater role than N-6 in enzyme tight-binding, and that a benzyl group can substitute for the sugar moiety at N-3. The absence of a sugar or benzyl group at N-3, however, leads to loss of activity. The hydroxyl group at C-8, while crucial for activity, does not alone confer the tight-binding characteristics to coformycins.